US20090071585A1 - Low Noise Pneumatic Tire - Google Patents
Low Noise Pneumatic Tire Download PDFInfo
- Publication number
- US20090071585A1 US20090071585A1 US11/886,708 US88670806A US2009071585A1 US 20090071585 A1 US20090071585 A1 US 20090071585A1 US 88670806 A US88670806 A US 88670806A US 2009071585 A1 US2009071585 A1 US 2009071585A1
- Authority
- US
- United States
- Prior art keywords
- absorbing member
- pneumatic tire
- noise absorbing
- tire
- peripheral surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 39
- 239000011241 protective layer Substances 0.000 claims abstract description 29
- 239000000314 lubricant Substances 0.000 claims abstract description 18
- 239000011148 porous material Substances 0.000 claims abstract description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 13
- 239000001993 wax Substances 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 229940057995 liquid paraffin Drugs 0.000 claims description 2
- 239000002480 mineral oil Substances 0.000 claims description 2
- 235000010446 mineral oil Nutrition 0.000 claims description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/10—Internal lubrication
- B60C17/106—Composition of the lubricant
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10036—Cushion and pneumatic combined
- Y10T152/10054—Enclosed cushion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
Definitions
- the present invention relates to a low noise pneumatic tire, and specifically, to an improvement of a low noise pneumatic tire in which a noise absorbing member of a porous material is disposed on the inner peripheral surface of the tire.
- a pneumatic tire of which the aspect ratio is smaller and the section height is lower has a tendency that the noise absorbing member is more likely to be damaged.
- Patent Document 1 Japanese patent application Kokai publication No. Sho62-216803
- Patent Document 2 Japanese patent application Kokai publication No. 2003-63208
- An object of the present invention is to provide a low noise pneumatic tire in which the noise absorbing member on the inner peripheral surface is made less likely to be damaged when the pneumatic tire is removed from the rim.
- a low noise pneumatic tire of the present invention which achieves the above-described object, includes a noise absorbing member of a porous material attached to an inner peripheral surface of the tire, in which a lubricant is applied to at least both end portions in a tire width direction of an inner peripheral surface of the noise absorbing member.
- another low noise pneumatic tire of the present invention which achieves the above-described object, includes a noise absorbing member of a porous material attached to an inner peripheral surface of the tire, in which both end portions in a tire width direction on an inner peripheral surface of the noise absorbing member are covered with protective layers harder than the noise absorbing member.
- the lubricant is applied to at least both of the end portions in the tire width direction on the inner peripheral surface of the noise absorbing member. Accordingly, even if the lever of the tire changer is brought into contact with the surface of the noise absorbing member when the pneumatic tire mounted on the rim is removed form the rim, the tip end of the lever slips on the surface of the noise absorbing member, thus making it possible to prevent the damage of the noise absorbing member.
- both of the end portions in the tire width direction on the inner peripheral surface of the noise absorbing member are covered with the protective layers harder than the noise absorbing member. Accordingly, when the pneumatic tire mounted on the rim is removed form the rim, strong pressing force from the lever of the tire changer is relieved by the above-described protective layers, thus making it possible to prevent the damage of the noise absorbing member. Hence, even if the pneumatic tire after being removed from the rim is reused, there is no concentration of a stress originated from such a damaged spot, and a breakage is less likely to occur. Accordingly, the noise absorbing performance of the noise absorbing member can be maintained for a long period of time.
- FIG. 1 is a meridian cross-sectional view showing a state where a low noise pneumatic tire according to an embodiment of the present invention is mounted on a rim.
- FIG. 2 is a meridian cross-sectional view showing a state where a low noise pneumatic tire according to another embodiment of the present invention is mounted on the rim.
- FIG. 3 is a perspective view showing a noise absorbing member attached to the pneumatic tire of FIG. 2 , in a state of partially being cutaway.
- FIG. 4 is a perspective view showing a noise absorbing member according to another embodiment, in a state of partially being cutaway.
- FIG. 5 is a perspective view showing a conventional low noise pneumatic tire, in a state of partially being cutaway.
- FIG. 6 is an explanatory view showing a cross-section of the low noise pneumatic tire of FIG. 5 when the low noise pneumatic tire is removed from the rim.
- FIG. 1 is a meridian cross-sectional view showing a state where a low noise pneumatic tire is mounted on a rim according to an embodiment of the present invention.
- Such a pneumatic tire T is composed of a pair of right and left side wall portions 3 , 3 as well as a pair of right and left bead portions 2 , 2 are formed respectively on the right and left sides of a tread portion 1 .
- a carcass layer that forms a frame of the tire, a belt layer that gives rigidity to the tread portion, and the like are provided in the tire body.
- a noise absorbing member 5 is attached by an elastic fixing band 6 .
- the noise absorbing member 5 is composed of a belt-like porous material, and is attached annularly so as to go along the inner peripheral surface la of the tire.
- an inner peripheral surface 5 a of the noise absorbing member 5 is entirely applied with a lubricant 4 .
- An applied region of the noise absorbing member 5 with the lubricant 4 only needs to be at least both end portions in the tire width direction of the inner peripheral surface 5 a .
- the entire region of the inner peripheral surface 5 a is applied with the lubricant 4 .
- the lubricant 4 may be applied also to an outer peripheral surface side of the noise absorbing member 5 .
- the lubricant is applied also to the outer peripheral surface of the noise absorbing member, whereby contact friction resistance between the noise absorbing member and the inner peripheral surface of the tire can be reduced. Accordingly, durability of the noise absorbing member can be enhanced.
- Types of the lubricant are not particularly limited; however, for example, wax, graphite, molybdenum disulfide, boron, polytetrafluoroethylene, talc, silicone, liquid paraffin, mineral oil, and the like can be illustrated. Only one type of these lubricants may be used singly, or two or more types thereof may be used in combination.
- wax there can be used natural wax; Fischer-Tropsch wax; hydrocarbon synthesis wax of a polyethylene and the like; fatty acid ester wax; fatty acid amid; ketones/amines; hardened caster oil; and the like. Also with regard to these waxes, only one type thereof may be used singly, or two or more types thereof may be used in combination.
- FIG. 2 shows a state where a low noise pneumatic tire is mounted on the rim according to another embodiment of the present invention
- FIG. 3 shows a noise absorbing member attached to an inner surface of the above-described tire, together with an elastic fixing band to attach the noise absorbing member.
- a tire body of such a pneumatic tire T of FIG. 2 is the same as that in the case of the embodiment of FIG. 1 , and accordingly, a description of the tire body will be omitted.
- a noise absorbing member 5 is composed of a belt-like porous material as in FIG. 1 , and such a belt-like member is attached annularly so as to go along a inner peripheral surface la of the tire in an inside of the tread portion 1 .
- protective layers 7 and 7 are provided on both of the end portions thereof in the tire width direction, and the protective layers 7 are composed of a hard resin sheet or a metal sheet, which is higher in hardness than the noise absorbing member 5 .
- the above-described protective layers 7 may be provided on the noise absorbing member 5 as in an embodiment shown in FIG. 4 .
- both side surfaces of the noise absorbing member 5 may be individually formed into inclined surfaces 5 b and 5 b
- both of the inclined surfaces 5 b and 5 b and both of the end portions of the inner peripheral surface 5 a in the tire width direction may be coated with the protective layers 7 and 7 .
- the end portions of the inner peripheral surface 5 a of the noise absorbing member 5 are coated with the protective layers 7 and 7 .
- the tip end of the lever X is brought into direct contact with the surface of the protective layer 7 , thus making it possible to prevent the noise absorbing member 5 from being damaged.
- durability of the noise absorbing member 5 is enhanced and good noise absorbing performance is maintained for a long period of time.
- a hard material for the protective layers 7 is not particularly limited, but includes the hard material higher in hardness than the noise absorbing member 5 ; however, should preferably be composed of resin sheets or metal sheets.
- resin sheets there are polypropylene, polyethylene, polyester, polyamide, and the like.
- metal sheets there are steel, copper, and the like, and stainless steel is particularly preferable.
- a thickness of the protective layers is set at 0.05 to 1.0 mm.
- the thickness of the protective layers is smaller than 0.05 mm, it is difficult to prevent the noise absorbing member from being damaged by the contact thereof with the tip end of the lever.
- the thickness of the protective layers is larger than 1.0 mm, bending rigidity of the noise absorbing member is increased, and accordingly, it is difficult to attach the noise absorbing member along the inner peripheral surface of the tire.
- a width of the protective layers in the tire width direction is set at 10 to 40 mm.
- the width of the protective layers is smaller than 10 mm, it is difficult to prevent the noise absorbing member from being damaged by the contact thereof with the tip end of the lever.
- the width of the protective layers is larger than 40 mm, a coated area of the protective layers to the inner peripheral surface of the noise absorbing member is too large, resulting in a decrease of the noise absorbing performance.
- the tire cavity sides of the protective layers 7 are applied with the lubricant used in the embodiment of FIG. 1 .
- the lubricant is used as described above, in order for the lever of the tire changer to slip on the protective layers 7 . Accordingly, such an effect of preventing the damage of the noise absorbing member by the protective layers can be further enhanced.
- the noise absorbing member 5 is attached to the inner peripheral surface la of the tire by disposing the elastic fixing band 6 on the outer periphery side of the noise absorbing member 5 ; however, the elastic fixing band 6 may be disposed and attached to the inner peripheral surface 5 a side of the noise absorbing member 5 .
- the above-described low noise pneumatic tire of the present invention can be applied to a general pneumatic tire.
- the low noise pneumatic tire concerned can exert a large effect particularly in the case of being applied to a pneumatic tire with the aspect ratio of 45% or less, which is likely to cause the damage of the noise absorbing member.
- a noise absorbing member made of a urethane foam, with a thickness of 20 mm and a width of 180 mm was attached to an inner peripheral surface of a low noise pneumatic tire with a size of 225/40R18 by an elastic fixing band, made of polypropylene resin, with a width of 20 mm and a thickness of 2 mm.
- low noise pneumatic tires were individually built, which are: a low noise pneumatic tire in which polyethylene wax was applied to an inner peripheral surface of the noise absorbing member (Example 1); a low noise pneumatic tire in which polypropylene resin sheets (protective layers) with a width of 20 mm and a thickness of 0.5 mm were covered on both end portions in the tire width direction of the inner peripheral surface of the noise absorbing member (Example 2); a low noise pneumatic tire in which the polyethylene wax was applied to surfaces of the protective layers in the tire configuration of Example 2 (Example 3); and a low noise pneumatic tire in which the surface of the noise absorbing member was not subjected to any process (Conventional example).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
- The present invention relates to a low noise pneumatic tire, and specifically, to an improvement of a low noise pneumatic tire in which a noise absorbing member of a porous material is disposed on the inner peripheral surface of the tire.
- There are various types of tire noises generated during the running of a pneumatic tire. As one of the tire noises, there is cavity resonance sound generated due to the vibration of the air filled in the tire. Heretofore, as a method for effectively reducing the cavity resonance sound, there has been proposed one as shown in
FIG. 5 , in which anoise absorbing member 5 of a porous material such as a polyurethane foam is disposed on the inner peripheral surface of the tire on the inner side of a tread portion 1, so that the cavity resonance sound is absorbed by the noise absorbing member 5 (for example, refer to Patent Documents 1 and 2). - When removing such a pneumatic tire T, in which the
noise absorbing member 5 is attached, from a rim R for the purpose of tire rotation or the like, after the pneumatic tire T is mounted on the rim R, as shown inFIG. 6 , a tip end of a lever X of a tire changer is sometimes pressed strongly against a surface of thenoise absorbing member 5. However, since the porous material composing the noise absorbing member is generally soft and low in tear strength, there is a problem that the noise absorbing member is likely to be damaged when the lever of the tire changer is pressed against the surface of the noise absorbing member as described above. Specifically, a pneumatic tire of which the aspect ratio is smaller and the section height is lower has a tendency that the noise absorbing member is more likely to be damaged. Once damage occurs as described above on the noise absorbing member of the low noise tire, a stress that is based on deformation of the pneumatic tire during the running thereof is concentrated to the damaged spot. Accordingly, the noise absorbing member is gradually removed from the inner peripheral surface of the tire, which leads to a problem that desired noise absorbing performance cannot be obtained. - Patent Document 1: Japanese patent application Kokai publication No. Sho62-216803
Patent Document 2: Japanese patent application Kokai publication No. 2003-63208 - An object of the present invention is to provide a low noise pneumatic tire in which the noise absorbing member on the inner peripheral surface is made less likely to be damaged when the pneumatic tire is removed from the rim.
- A low noise pneumatic tire of the present invention, which achieves the above-described object, includes a noise absorbing member of a porous material attached to an inner peripheral surface of the tire, in which a lubricant is applied to at least both end portions in a tire width direction of an inner peripheral surface of the noise absorbing member.
- Moreover, another low noise pneumatic tire of the present invention, which achieves the above-described object, includes a noise absorbing member of a porous material attached to an inner peripheral surface of the tire, in which both end portions in a tire width direction on an inner peripheral surface of the noise absorbing member are covered with protective layers harder than the noise absorbing member.
- In accordance with the former low noise pneumatic tire, the lubricant is applied to at least both of the end portions in the tire width direction on the inner peripheral surface of the noise absorbing member. Accordingly, even if the lever of the tire changer is brought into contact with the surface of the noise absorbing member when the pneumatic tire mounted on the rim is removed form the rim, the tip end of the lever slips on the surface of the noise absorbing member, thus making it possible to prevent the damage of the noise absorbing member.
- Moreover, in accordance with the latter low noise pneumatic tire, both of the end portions in the tire width direction on the inner peripheral surface of the noise absorbing member are covered with the protective layers harder than the noise absorbing member. Accordingly, when the pneumatic tire mounted on the rim is removed form the rim, strong pressing force from the lever of the tire changer is relieved by the above-described protective layers, thus making it possible to prevent the damage of the noise absorbing member. Hence, even if the pneumatic tire after being removed from the rim is reused, there is no concentration of a stress originated from such a damaged spot, and a breakage is less likely to occur. Accordingly, the noise absorbing performance of the noise absorbing member can be maintained for a long period of time.
-
FIG. 1 is a meridian cross-sectional view showing a state where a low noise pneumatic tire according to an embodiment of the present invention is mounted on a rim. -
FIG. 2 is a meridian cross-sectional view showing a state where a low noise pneumatic tire according to another embodiment of the present invention is mounted on the rim. -
FIG. 3 is a perspective view showing a noise absorbing member attached to the pneumatic tire ofFIG. 2 , in a state of partially being cutaway. -
FIG. 4 is a perspective view showing a noise absorbing member according to another embodiment, in a state of partially being cutaway. -
FIG. 5 is a perspective view showing a conventional low noise pneumatic tire, in a state of partially being cutaway. -
FIG. 6 is an explanatory view showing a cross-section of the low noise pneumatic tire ofFIG. 5 when the low noise pneumatic tire is removed from the rim. - A description will be made below of a low noise pneumatic tire of the present invention with reference to the embodiments shown in the drawings.
-
FIG. 1 is a meridian cross-sectional view showing a state where a low noise pneumatic tire is mounted on a rim according to an embodiment of the present invention. - Such a pneumatic tire T is composed of a pair of right and left
side wall portions bead portions noise absorbing member 5 is attached by anelastic fixing band 6. Thenoise absorbing member 5 is composed of a belt-like porous material, and is attached annularly so as to go along the inner peripheral surface la of the tire. Moreover, an innerperipheral surface 5 a of thenoise absorbing member 5 is entirely applied with alubricant 4. - When the above-described pneumatic tire T in the state of being mounted on the rim R is removed from the rim R by using a tire changer, as shown in
FIG. 6 , a tip end of a lever X of the tire changer sometimes presses the surface of thenoise absorbing member 5. However, in the above-described pneumatic tire T, thelubricant 4 is applied to the surface of thenoise absorbing member 5, and accordingly, even if the lever X is pressed against the surface concerned, the tip end thereof slips on the surface, and thereby does not damage thenoise absorbing member 5. Accordingly, even if the pneumatic tire concerned is reused after being removed from the rim, the noise absorbing member is not broken at an early stage, but can exert good noise absorbing performance for a long period of time. - An applied region of the
noise absorbing member 5 with thelubricant 4 only needs to be at least both end portions in the tire width direction of the innerperipheral surface 5 a. Preferably, the entire region of the innerperipheral surface 5 a is applied with thelubricant 4. Besides such a case as described above where thelubricant 4 is applied to the innerperipheral surface 5 a of thenoise absorbing member 5, thelubricant 4 may be applied also to an outer peripheral surface side of thenoise absorbing member 5. The lubricant is applied also to the outer peripheral surface of the noise absorbing member, whereby contact friction resistance between the noise absorbing member and the inner peripheral surface of the tire can be reduced. Accordingly, durability of the noise absorbing member can be enhanced. - Types of the lubricant are not particularly limited; however, for example, wax, graphite, molybdenum disulfide, boron, polytetrafluoroethylene, talc, silicone, liquid paraffin, mineral oil, and the like can be illustrated. Only one type of these lubricants may be used singly, or two or more types thereof may be used in combination. As the above-described wax, there can be used natural wax; Fischer-Tropsch wax; hydrocarbon synthesis wax of a polyethylene and the like; fatty acid ester wax; fatty acid amid; ketones/amines; hardened caster oil; and the like. Also with regard to these waxes, only one type thereof may be used singly, or two or more types thereof may be used in combination.
-
FIG. 2 shows a state where a low noise pneumatic tire is mounted on the rim according to another embodiment of the present invention, andFIG. 3 shows a noise absorbing member attached to an inner surface of the above-described tire, together with an elastic fixing band to attach the noise absorbing member. - A tire body of such a pneumatic tire T of
FIG. 2 is the same as that in the case of the embodiment ofFIG. 1 , and accordingly, a description of the tire body will be omitted. Referring also toFIG. 3 together withFIG. 1 , anoise absorbing member 5 is composed of a belt-like porous material as inFIG. 1 , and such a belt-like member is attached annularly so as to go along a inner peripheral surface la of the tire in an inside of the tread portion 1. On the innerperipheral surface 5 a of thenoise absorbing member 5,protective layers protective layers 7 are composed of a hard resin sheet or a metal sheet, which is higher in hardness than thenoise absorbing member 5. - The above-described
protective layers 7 may be provided on thenoise absorbing member 5 as in an embodiment shown inFIG. 4 . Specifically, both side surfaces of thenoise absorbing member 5 may be individually formed intoinclined surfaces inclined surfaces peripheral surface 5 a in the tire width direction may be coated with theprotective layers - As described above, at least both of the end portions of the inner
peripheral surface 5 a of thenoise absorbing member 5 are coated with theprotective layers protective layer 7, thus making it possible to prevent thenoise absorbing member 5 from being damaged. Hence, as in the embodiment ofFIG. 1 , durability of thenoise absorbing member 5 is enhanced and good noise absorbing performance is maintained for a long period of time. - In the present invention, a hard material for the
protective layers 7 is not particularly limited, but includes the hard material higher in hardness than thenoise absorbing member 5; however, should preferably be composed of resin sheets or metal sheets. As a material for the resin sheets, there are polypropylene, polyethylene, polyester, polyamide, and the like. As a material for the metal sheets, there are steel, copper, and the like, and stainless steel is particularly preferable. - Preferably, a thickness of the protective layers is set at 0.05 to 1.0 mm. When the thickness of the protective layers is smaller than 0.05 mm, it is difficult to prevent the noise absorbing member from being damaged by the contact thereof with the tip end of the lever. Meanwhile, when the thickness of the protective layers is larger than 1.0 mm, bending rigidity of the noise absorbing member is increased, and accordingly, it is difficult to attach the noise absorbing member along the inner peripheral surface of the tire.
- Preferably, a width of the protective layers in the tire width direction is set at 10 to 40 mm. When the width of the protective layers is smaller than 10 mm, it is difficult to prevent the noise absorbing member from being damaged by the contact thereof with the tip end of the lever. Moreover, when the width of the protective layers is larger than 40 mm, a coated area of the protective layers to the inner peripheral surface of the noise absorbing member is too large, resulting in a decrease of the noise absorbing performance.
- Moreover, in the embodiment of
FIG. 2 , more preferably, the tire cavity sides of theprotective layers 7 are applied with the lubricant used in the embodiment ofFIG. 1 . The lubricant is used as described above, in order for the lever of the tire changer to slip on the protective layers 7. Accordingly, such an effect of preventing the damage of the noise absorbing member by the protective layers can be further enhanced. - Note that, in the embodiments of
FIG. 1 andFIG. 2 , thenoise absorbing member 5 is attached to the inner peripheral surface la of the tire by disposing theelastic fixing band 6 on the outer periphery side of thenoise absorbing member 5; however, theelastic fixing band 6 may be disposed and attached to the innerperipheral surface 5 a side of thenoise absorbing member 5. - The above-described low noise pneumatic tire of the present invention can be applied to a general pneumatic tire. However, the low noise pneumatic tire concerned can exert a large effect particularly in the case of being applied to a pneumatic tire with the aspect ratio of 45% or less, which is likely to cause the damage of the noise absorbing member.
- As a common condition, the following was set, where a noise absorbing member, made of a urethane foam, with a thickness of 20 mm and a width of 180 mm was attached to an inner peripheral surface of a low noise pneumatic tire with a size of 225/40R18 by an elastic fixing band, made of polypropylene resin, with a width of 20 mm and a thickness of 2 mm. Then, the following low noise pneumatic tires were individually built, which are: a low noise pneumatic tire in which polyethylene wax was applied to an inner peripheral surface of the noise absorbing member (Example 1); a low noise pneumatic tire in which polypropylene resin sheets (protective layers) with a width of 20 mm and a thickness of 0.5 mm were covered on both end portions in the tire width direction of the inner peripheral surface of the noise absorbing member (Example 2); a low noise pneumatic tire in which the polyethylene wax was applied to surfaces of the protective layers in the tire configuration of Example 2 (Example 3); and a low noise pneumatic tire in which the surface of the noise absorbing member was not subjected to any process (Conventional example).
- For each of these three types of pneumatic tires, fifty times repeated was work of removing these pneumatic tires from a rim by using the same tire changer after mounting the pneumatic tires concerned to the rim. Then, the number of times that damage occurred on the surface of each noise absorbing member was investigated. Results of the investigations are shown in Table 1.
-
TABLE 1 Example Example Example Conventional 1 2 3 example Occurrence of the 4 1 0 17 number of times that noise absorbing member is damaged - As is clear from the results shown in Table 1, in Examples 1 and 2, the occurrences of the damage on the noise absorbing member are drastically reduced compared to the conventional example.
Claims (10)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005-126359 | 2005-04-25 | ||
JP2005126359A JP4507970B2 (en) | 2005-04-25 | 2005-04-25 | Low noise pneumatic tire |
PCT/JP2006/308599 WO2006115253A1 (en) | 2005-04-25 | 2006-04-25 | Low noise pneumatic tire |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/308599 A-371-Of-International WO2006115253A1 (en) | 2005-04-25 | 2006-04-25 | Low noise pneumatic tire |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/036,824 Division US8905099B2 (en) | 2005-04-25 | 2013-09-25 | Low noise pneumatic tire |
Publications (2)
Publication Number | Publication Date |
---|---|
US20090071585A1 true US20090071585A1 (en) | 2009-03-19 |
US8567464B2 US8567464B2 (en) | 2013-10-29 |
Family
ID=37214867
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/886,708 Active 2029-05-01 US8567464B2 (en) | 2005-04-25 | 2006-04-25 | Low noise pneumatic tire |
US14/036,824 Active US8905099B2 (en) | 2005-04-25 | 2013-09-25 | Low noise pneumatic tire |
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US14/036,824 Active US8905099B2 (en) | 2005-04-25 | 2013-09-25 | Low noise pneumatic tire |
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US (2) | US8567464B2 (en) |
JP (1) | JP4507970B2 (en) |
CN (2) | CN101166638B (en) |
DE (1) | DE112006000830B4 (en) |
WO (1) | WO2006115253A1 (en) |
Cited By (6)
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US20080073016A1 (en) * | 2004-08-04 | 2008-03-27 | Atsushi Tanno | Pneumatic Tire |
US20100071820A1 (en) * | 2008-09-24 | 2010-03-25 | Bridgestone Americas Tire Operations, Llc | Tire and noise reducer |
US9090128B2 (en) | 2013-08-16 | 2015-07-28 | GM Global Technology Operations LLC | Wheel assembly for a vehicle and a method of manufacturing the wheel assembly |
US9302537B2 (en) | 2013-08-16 | 2016-04-05 | GM Global Technology Operations LLC | Noise suppression device for a wheel assembly |
EP3515729A4 (en) * | 2016-09-23 | 2020-06-03 | Bridgestone Americas Tire Operations, LLC | Devices for reducing tire noise |
WO2023138518A1 (en) * | 2022-01-18 | 2023-07-27 | 卫向坡 | Blowout safety tire |
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JP4175478B2 (en) | 2005-04-28 | 2008-11-05 | 横浜ゴム株式会社 | Pneumatic tire and manufacturing method thereof |
JP4520936B2 (en) * | 2005-12-12 | 2010-08-11 | 住友ゴム工業株式会社 | Pneumatic tire with noise control |
CN103465731B (en) * | 2013-09-17 | 2015-11-11 | 山东永泰化工有限公司 | Low noise pneumatic tire |
JP6601153B2 (en) * | 2015-10-28 | 2019-11-06 | 横浜ゴム株式会社 | Pneumatic tire |
US10445253B2 (en) * | 2016-04-20 | 2019-10-15 | International Business Machines Corporation | Cost effective service level agreement data management |
US10864782B2 (en) | 2016-09-07 | 2020-12-15 | Bridgestone Americas Tire Operations, Llc | Devices for reducing tire noise |
US20190351717A1 (en) | 2016-11-17 | 2019-11-21 | Bridgestone Americas Tire Operations, Llc | Pneumatic tire having dampening element adhered to air barrier layer |
KR101938987B1 (en) * | 2017-08-16 | 2019-01-15 | 한국타이어 주식회사 | Cavity noise reduction tire |
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Citations (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2040645A (en) * | 1934-07-27 | 1936-05-12 | Fredrick S Dickinson | Noncollapsible tire |
US4031940A (en) * | 1975-02-21 | 1977-06-28 | The B. F. Goodrich Company | Pneumatic tire |
US4096898A (en) * | 1976-02-09 | 1978-06-27 | The B.F. Goodrich Company | Internal tire lubricant |
US4216812A (en) * | 1977-08-11 | 1980-08-12 | Dunlop Limited | Pneumatic tire containing puncture sealants |
US4287930A (en) * | 1980-04-11 | 1981-09-08 | The Goodyear Tire & Rubber Company | Tire and method of reinforcement |
US4340104A (en) * | 1978-06-30 | 1982-07-20 | The General Tire & Rubber Company | Deflated tire lubricant |
US4681147A (en) * | 1982-09-02 | 1987-07-21 | Hutchinson S.A. | Safety device and tire construction for vehicles or other contrivances |
US6217683B1 (en) * | 1998-02-12 | 2001-04-17 | Michelin Recherche Et Technique S.A. | Monitored vehicle tire and monitor retainer assembly |
US6538066B2 (en) * | 1998-01-13 | 2003-03-25 | The Yokohama Rubber Co., Ltd. | Thermoplastic elastomer composition and process for producing the same and pneumatic tire and hose using the same |
US20030111156A1 (en) * | 2001-12-18 | 2003-06-19 | Mcnichols Patrick Sean | Rotary ultrasonic bonder or processor capable of fixed gap operation |
US6726289B2 (en) * | 2001-04-16 | 2004-04-27 | Sumitomo Rubber Industries, Ltd. | Tire noise reducing system |
JP2004291855A (en) * | 2003-03-27 | 2004-10-21 | Honda Motor Co Ltd | Noise reduction structure of tire |
US20050046978A1 (en) * | 2002-01-31 | 2005-03-03 | Donnelly Corporation, A Corporation Of The State Of Michigan | Vehicle accessory module |
US20050205183A1 (en) * | 2004-03-16 | 2005-09-22 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire with noise damper |
US20050247391A1 (en) * | 2002-07-12 | 2005-11-10 | Toru Ikuta | Rubber-reinforced structure |
US20050275277A1 (en) * | 2004-06-14 | 2005-12-15 | Sumitomo Rubber Industries, Ltd. | Tire noise reducing system |
US20060108042A1 (en) * | 2004-11-19 | 2006-05-25 | Sumitomo Rubber Insustries, Ltd. | Assembly of pneumatic tire and rim, and a noise damper used therein |
US7490644B2 (en) * | 2005-06-01 | 2009-02-17 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire with noise damper |
US20090199942A1 (en) * | 2005-04-28 | 2009-08-13 | The Yokohama Rubber Co., Ltd. | Pneumatic tire and method of manufacturing the same |
US20090242094A1 (en) * | 2006-06-02 | 2009-10-01 | Bridgestone Corporation | Pneumatic tire |
US20090314403A1 (en) * | 2008-06-20 | 2009-12-24 | The Yokohama Rubber Co., Ltd. | Tire noise reduction device |
US20090320980A1 (en) * | 2005-04-28 | 2009-12-31 | The Yokohama Rubber Co., Ltd. | Noise reducing device, manufacturing method for the noise reducing device, and pneumatic tire having the noise reducing device |
US20100032073A1 (en) * | 2005-04-28 | 2010-02-11 | The Yokohama Rubber Co., Ltd. | Noise reducing device, manufacturing method for the noise reducing device, and pneumatic tire having the noise reducing device |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1359468A (en) * | 1970-06-20 | 1974-07-10 | Dunlop Holdings Ltd | Pneumatic tyres and wheel rim assemblies |
DE3016255A1 (en) * | 1980-04-26 | 1981-10-29 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | GAS FILLED VEHICLE TIRE |
JPS62216803A (en) | 1986-03-17 | 1987-09-24 | Bridgestone Corp | Tyre resonance preventing material |
JPS6478902A (en) | 1987-06-26 | 1989-03-24 | Bridgestone Corp | Low noise tire wheel |
JPH04159101A (en) * | 1990-10-22 | 1992-06-02 | Mazda Motor Corp | Tire wheel structure of vehicle |
JP3244542B2 (en) | 1992-09-29 | 2002-01-07 | マツダ株式会社 | Manufacturing method of low road noise wheel |
EP0698639B1 (en) | 1993-03-30 | 1998-12-30 | Nippon Zeon Co., Ltd. | Rubber composition |
DE4325470A1 (en) * | 1993-07-29 | 1995-02-02 | Egon Turba | Low-noise vehicle wheel |
JP3212470B2 (en) | 1995-02-16 | 2001-09-25 | 横浜ゴム株式会社 | Polymer composition for tires |
JPH0986112A (en) * | 1995-09-28 | 1997-03-31 | Tokai Rubber Ind Ltd | Wheel acoustic material |
DE19806935C2 (en) | 1998-02-19 | 2001-10-18 | Continental Ag | Process for producing a pneumatic vehicle tire with a sound-absorbing foam layer adhering to its inner liner and pneumatic vehicle tire manufactured according to this method |
JP3695255B2 (en) | 1999-10-15 | 2005-09-14 | 三菱自動車工業株式会社 | Vehicle wheel structure |
JP3943799B2 (en) * | 2000-04-05 | 2007-07-11 | 本田技研工業株式会社 | Anti-puncture sealant, tubeless tires and tire tubes |
JP3621899B2 (en) | 2001-08-28 | 2005-02-16 | 住友ゴム工業株式会社 | Pneumatic tire and rim assembly |
JP3995489B2 (en) | 2002-02-05 | 2007-10-24 | 横浜ゴム株式会社 | Pneumatic tire and tire cavity resonance suppression device |
JP4318639B2 (en) | 2002-06-05 | 2009-08-26 | 住友ゴム工業株式会社 | Pneumatic tire and rim assembly, and sound absorber used therefor |
JP2004276809A (en) * | 2003-03-17 | 2004-10-07 | Honda Motor Co Ltd | Vehicular wheel |
US7556075B2 (en) | 2003-08-04 | 2009-07-07 | The Yokohama Rubber Co., Ltd. | Low noise pneumatic tire |
JP4428061B2 (en) * | 2004-01-20 | 2010-03-10 | 横浜ゴム株式会社 | Pneumatic tire |
JP2005238888A (en) * | 2004-02-24 | 2005-09-08 | Tokai Rubber Ind Ltd | Tire sound absorbing material |
JP3964878B2 (en) * | 2004-03-16 | 2007-08-22 | 住友ゴム工業株式会社 | Pneumatic tire and rim assembly |
JP4415738B2 (en) * | 2004-04-14 | 2010-02-17 | 横浜ゴム株式会社 | Tire wheel assembly and run-flat core |
JP3916625B2 (en) | 2004-08-05 | 2007-05-16 | 横浜ゴム株式会社 | Pneumatic tire |
JP4525800B2 (en) | 2008-06-20 | 2010-08-18 | 横浜ゴム株式会社 | Tire noise reduction device and pneumatic tire equipped with the same |
-
2005
- 2005-04-25 JP JP2005126359A patent/JP4507970B2/en not_active Expired - Fee Related
-
2006
- 2006-04-25 US US11/886,708 patent/US8567464B2/en active Active
- 2006-04-25 WO PCT/JP2006/308599 patent/WO2006115253A1/en active Application Filing
- 2006-04-25 CN CN2006800139959A patent/CN101166638B/en active Active
- 2006-04-25 DE DE112006000830.7T patent/DE112006000830B4/en active Active
- 2006-04-25 CN CN2010101667029A patent/CN101817290B/en active Active
-
2013
- 2013-09-25 US US14/036,824 patent/US8905099B2/en active Active
Patent Citations (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2040645A (en) * | 1934-07-27 | 1936-05-12 | Fredrick S Dickinson | Noncollapsible tire |
US4031940A (en) * | 1975-02-21 | 1977-06-28 | The B. F. Goodrich Company | Pneumatic tire |
US4096898A (en) * | 1976-02-09 | 1978-06-27 | The B.F. Goodrich Company | Internal tire lubricant |
US4216812A (en) * | 1977-08-11 | 1980-08-12 | Dunlop Limited | Pneumatic tire containing puncture sealants |
US4340104A (en) * | 1978-06-30 | 1982-07-20 | The General Tire & Rubber Company | Deflated tire lubricant |
US4287930A (en) * | 1980-04-11 | 1981-09-08 | The Goodyear Tire & Rubber Company | Tire and method of reinforcement |
US4681147A (en) * | 1982-09-02 | 1987-07-21 | Hutchinson S.A. | Safety device and tire construction for vehicles or other contrivances |
US6538066B2 (en) * | 1998-01-13 | 2003-03-25 | The Yokohama Rubber Co., Ltd. | Thermoplastic elastomer composition and process for producing the same and pneumatic tire and hose using the same |
US6217683B1 (en) * | 1998-02-12 | 2001-04-17 | Michelin Recherche Et Technique S.A. | Monitored vehicle tire and monitor retainer assembly |
US6726289B2 (en) * | 2001-04-16 | 2004-04-27 | Sumitomo Rubber Industries, Ltd. | Tire noise reducing system |
US20030111156A1 (en) * | 2001-12-18 | 2003-06-19 | Mcnichols Patrick Sean | Rotary ultrasonic bonder or processor capable of fixed gap operation |
US20050046978A1 (en) * | 2002-01-31 | 2005-03-03 | Donnelly Corporation, A Corporation Of The State Of Michigan | Vehicle accessory module |
US20050247391A1 (en) * | 2002-07-12 | 2005-11-10 | Toru Ikuta | Rubber-reinforced structure |
JP2004291855A (en) * | 2003-03-27 | 2004-10-21 | Honda Motor Co Ltd | Noise reduction structure of tire |
US20050205183A1 (en) * | 2004-03-16 | 2005-09-22 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire with noise damper |
US20050275277A1 (en) * | 2004-06-14 | 2005-12-15 | Sumitomo Rubber Industries, Ltd. | Tire noise reducing system |
US20060108042A1 (en) * | 2004-11-19 | 2006-05-25 | Sumitomo Rubber Insustries, Ltd. | Assembly of pneumatic tire and rim, and a noise damper used therein |
US7455092B2 (en) * | 2004-11-19 | 2008-11-25 | Sumitomo Rubber Industries, Ltd. | Assembly of pneumatic tire and rim, and a noise damper used therein |
US20090199942A1 (en) * | 2005-04-28 | 2009-08-13 | The Yokohama Rubber Co., Ltd. | Pneumatic tire and method of manufacturing the same |
US20090320980A1 (en) * | 2005-04-28 | 2009-12-31 | The Yokohama Rubber Co., Ltd. | Noise reducing device, manufacturing method for the noise reducing device, and pneumatic tire having the noise reducing device |
US20100032073A1 (en) * | 2005-04-28 | 2010-02-11 | The Yokohama Rubber Co., Ltd. | Noise reducing device, manufacturing method for the noise reducing device, and pneumatic tire having the noise reducing device |
US7490644B2 (en) * | 2005-06-01 | 2009-02-17 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire with noise damper |
US20090242094A1 (en) * | 2006-06-02 | 2009-10-01 | Bridgestone Corporation | Pneumatic tire |
US20090314403A1 (en) * | 2008-06-20 | 2009-12-24 | The Yokohama Rubber Co., Ltd. | Tire noise reduction device |
Non-Patent Citations (1)
Title |
---|
English machine translation of JP 2004-291855 A, October 21, 2004. * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080073016A1 (en) * | 2004-08-04 | 2008-03-27 | Atsushi Tanno | Pneumatic Tire |
US7823613B2 (en) | 2004-08-04 | 2010-11-02 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
US20100071820A1 (en) * | 2008-09-24 | 2010-03-25 | Bridgestone Americas Tire Operations, Llc | Tire and noise reducer |
US9090128B2 (en) | 2013-08-16 | 2015-07-28 | GM Global Technology Operations LLC | Wheel assembly for a vehicle and a method of manufacturing the wheel assembly |
US9302537B2 (en) | 2013-08-16 | 2016-04-05 | GM Global Technology Operations LLC | Noise suppression device for a wheel assembly |
EP3515729A4 (en) * | 2016-09-23 | 2020-06-03 | Bridgestone Americas Tire Operations, LLC | Devices for reducing tire noise |
US11440357B2 (en) | 2016-09-23 | 2022-09-13 | Bridgestone Americas Tire Operations, Llc | Devices for reducing tire noise |
WO2023138518A1 (en) * | 2022-01-18 | 2023-07-27 | 卫向坡 | Blowout safety tire |
Also Published As
Publication number | Publication date |
---|---|
DE112006000830B4 (en) | 2021-02-11 |
DE112006000830T5 (en) | 2008-03-13 |
WO2006115253A1 (en) | 2006-11-02 |
CN101166638A (en) | 2008-04-23 |
US8567464B2 (en) | 2013-10-29 |
CN101817290B (en) | 2012-02-15 |
CN101817290A (en) | 2010-09-01 |
US20140020801A1 (en) | 2014-01-23 |
US8905099B2 (en) | 2014-12-09 |
CN101166638B (en) | 2011-08-03 |
JP2006298299A (en) | 2006-11-02 |
JP4507970B2 (en) | 2010-07-21 |
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